Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantas categorias de tempo decorrido existem para o jogo de badugi de limite fixo de $16,50?
 ###Tabelas: CREATE TABLE doubles:_6_5_titles_1_runner-up (doubles:_6_5_titles_1_runner-up_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Date VARCHAR, Tournament VARCHAR, Surface VARCHAR, Partner VARCHAR, Opponent VARCHAR, Score VARCHAR) CREATE TABLE minnesota_counties_ranked_by_per_capita_income (minnesota_counties_ranked_by_per_capita_income_id AUTO_INCREMENT PRIMARY KEY, County VARCHAR, Per capita income VARCHAR, Median household income VARCHAR, Median family income VARCHAR, Population INT, Number of households INT) CREATE TABLE 2011_events (2011_events_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Event # VARCHAR, Event VARCHAR, Winner VARCHAR, Prize VARCHAR, Entries VARCHAR, Prize Pool VARCHAR, Elapsed Time VARCHAR) CREATE TABLE series_characters (series_characters_id AUTO_INCREMENT PRIMARY KEY, Character VARCHAR, Game VARCHAR, Platform VARCHAR, Status VARCHAR, Mystic Arte VARCHAR, Character Voice VARCHAR) CREATE TABLE minor_competitions (minor_competitions_id AUTO_INCREMENT PRIMARY KEY, Competition VARCHAR, Played INT, Derby County INT, Draw INT, Nottingham Forest INT, Derby County Goals INT, Nottingham Forest Goals INT)  
SELECT COUNT Elapsed Time FROM 2011_events WHERE Event = $16.50 Fixed-Limit Badugi